LibGuides: GovSpeak: A Guide to U.S. Government Acronyms & Abbreviations: C

C3	Critical Infrastructure Cyber Community Voluntary Program (unable to verify 8/19) \| Cyber Crimes Center \| Pacific Northwest Climate Change Collaboration (unable to verify 9/15)
CA	Bureau of Consular Affairs (older link archive; archive2)
CAAAC	Clean Air Act Advisory Committee
CAAR	Cost Analysis and Audit Resolution
CAB	Climate Analysis Branch (unable to verify 11/18)
caBIG	Cancer Biomedical Informatics Grid (defunct)
CAC	Census Advisory Committees
CACFP	Child and Adult Care Food Program
CADDIS	Causal Analysis/Diagnosis Decision Information System (older link archive)
CADR	Collaborative Action and Dispute Resolution, BLM \| Office of Collaborative Action and Dispute Resolution, DOI
CAE	Centers of Academic Excellence
CAERS	CFSAN Adverse Event Reporting System (older link archive)
CAFE	Corporate Average Fuel Economy
CAH	Consumer Action Handbook
CAHPS	Consumer Assessment of Healthcare Providers and Systems
CAI	Center for Accelerating Innovation
CAIS	Childhood Agricultural Injury Survey
CAL	Compassionate Allowances
Calclim	California Climate Data Archive
CALiPER	Commercially Available LED Product Evaluation and Reporting (older link archive)
CALIPSO	Cloud-Aerosol Lidar and Infrared Pathfinder Satellite Observation
CAMD	Clean Air Markets Division
CAMEO	Computer-Aided Management of Emergency Operations
CAMI	Civil Aerospace Medical Institute
CAMICC	CDC/ATSDR Minority Initiatives Coordinating Committee (defunct)
CAMP	College Assistance Migrant Program (older link archive)
CAMS	Center for Accelerator Mass Spectrometry

CAN	Cures Acceleration Network
CAOC	Chief Acquisition Officers Council (earlier link)
CAP	Client Assistance Program \| Criminal Alien Program \| Cross-Agency Performance Goals (inactive; older link archive)
CAPP	Coastal Aquaculture Planning Portal (older link archive)
CAPPS II	Computer Assisted Passenger Prescreening System (unable to verify; see GAO Report)
CAPS	Cooperative Agricultural Pest Survey
CAPT	Center for the Application of Prevention Technologies (unable to verify 5/19)
CAPUS	Care and Prevention in the United States
CAR	Climate Action Report (archived)
CARDS	Computer Access to Research on Dietary Supplements
CARE	Community Action for a Renewed Environment (unavailable 2/18)
CARS	Car Allowance Rebate System (defunct) \| Central Accounting Reporting System (older link archive)
CART	Community Assessment Reporting Tool
CARVE	Carbon in Arctic Reservoirs Vulnerability Experiment
CASAC	Clean Air Scientific Advisory Committee
CASC	Center for Applied Scientific Computing (older link archive) \| Climate Adaptation Science Center (older link archive)
CASL	Consortium for Advanced Simulation of Light Water Reactors
CASMIRC	Child Abduction and Serial Murder Investigative Resources Center
CASOM	Comprehensive Approaches to Sex Offender Management Program
CASPIR	CDC and ATSDR Specimen Packaging, Inventory and Repository (unable to verify 8/14)
CASTNET	Clean Air Status and Trends Network
CASU	Cooperative Administrative Support Units (defunct)
CAT	Chemical Catalysis
CATC	Clean Air Technology Center \| College Affordability and Transparency Center
CATR	Office of Conventional Arms Threat Reduction (older link archive; archive2)
CatReg	Categorical Regression Analysis
CATS	Cloud-Aerosol Transport System
CAVC	United States Court of Appeals for Veterans Claims
CAW	Center for Animal Welfare
CAWSC	California Water Science Center (older link archive)

CB	Children's Bureau
CBA	Office of Commercial and Business Affairs (older link archive)
CBB	Capacity Building Branch \| Census Business Builder
CBCA	Civilian Board of Contract Appeals
CBD	Chemical and Biological Defense Division \| Commerce Business Daily (changed to FBO)
CBECS	Commercial Buildings Energy Consumption Survey
CBER	Center for Biologics Evaluation and Research (older link archive; archive2)
CBES	Center for BioEnergy Sustainability (older link archive)
CBET	Division of Chemical, Bioengineering, Environmental, and Transport Systems
CBHSQ	Center for Behavioral Health Statistics and Quality
CBI	Center for Biological Informatics (unable to verify 3/13)
CBIBS	Chesapeake Bay Interpretive Buoy System
CBMP	Cell Biology and Metabolism Program (unable to verify 11/16)
CBO	Congressional Budget Office
CBOB	Law Enforcement Congressional Badge of Bravery Program (older link archive)
CBOPC	Chief Business Office Purchased Care (changed to OCC)
CBP	County Business Patterns \| Customs and Border Protection
CBPO	Chesapeake Bay Program Office
CBPR	Community Based Participatory Research Program
CBRN	Chemical, Biological, Radiological, and Nuclear
CBS	Cytokine Biology Section (unable to verify 1/17) \| Division of Chemical & Biological Sciences
CBW	Office of Chemical and Biological Weapons Affairs
CBWI	Chesapeake Bay Watershed Initiative
CBWR	Community-Based Water Resiliency
CBX	Children's Bureau Express

CC	NIH Clinical Center
CCAC	Citizens Coinage Advisory Committee
CCAM	Coordinating Council on Access and Mobility (older link archive; archive2)
CCAMPIS	Child Care Access Means Parents in School Program
C-CAP	Coastal Change Analysis Program
CCAR	Comprehensive Capital Analysis and Review (older link archive)
CCB	Child Care Bureau (changed to OCC) \| Clinical Chemistry Branch
CCC	Commodity Credit Corporation (older link archive)
CCCT	Coordinating Center for Clinical Trials
CCD	Climate Change Division (unable to verify 7/17) \| Common Core of Data
CCDB	Consumer Complaint Database
CCDF	Child Care and Development Fund
CCDO	Community Capacity Development Office (defunct as of 6/11)
CCDS	Consensus CDS
CCED	Chemical Characterization and Exposure Division
CCEHBR	Center for Coastal Environmental Health and Biomolecular Research (unable to verify 10/17)
CCEHIP	Coordinating Center for Environmental Health and Injury Prevention (defunct)
CCF	Capital Construction Fund (older link archive) \| Christopher Columbus Fellowship Foundation (defunct as of 3/15) \| Compassion Capital Fund \| Division of Computing and Communication Foundations
CCG	Country Commercial Guides (older link archive)
CCGO	Clinical Center Genomics Opportunity (older link archive)
CCH	Center for Cryptologic History
CCHHG	Interagency Crosscutting Group on Climate Change and Human Health
CCHIS	Coordinating Center for Health Information and Service (unable to verify 12/15)

CCID	Coordinating Center for Infectious Diseases (defunct)
CCIIO	Center for Consumer Information and Insurance Oversight
CCIPS	Computer Crime & Intellectual Property Section
CCIWG	Carbon Cycle Interagency Working Group
CCJJDP	Coordinating Council on Juvenile Justice and Delinquency Prevention
CCL	Drinking Water Contaminant Candidate List
CCLI	Capital Case Litigation Initiative (older link archive; archive2)
CCMA	Center for Coastal Monitoring and Assessment (unable to verify 10/17)
CCMC	Community Coordinated Modeling Center
CCP	Comprehensive Conservation Plan
CCPI	Clean Coal Power Initiative (unable to verify 2/18)
CCPO	Climate Change Program Office
CCR	Center for Cancer Research \| Central Contractor Registration (absorbed into SAM) \| Commission on Civil Rights \| Consumer Confidence Reports
CCRB	Collaborative Clinical Research Branch
CCRC	Climate Change Resource Center
CCRI	Climate Change Research Initiative
CCRIS	Chemical Carcinogenesis Research Information System (older link archive)
CCRP	Climate Change Response Program
CCS	Capital Case Section \| Carbon Capture and Storage (older link archive; archive2; archive3)
CCSI	Climate Change Science Institute (older link archive)
CCSQ	Center for Clinical Standards & Quality (older link archive)
CCT	Center for Cancer Training
CCTAN	Child Care Technical Assistance Network (changed to T/TA)
CCTE	Center for Computational Toxicology & Exposure
CCTN	Center for Clinical Trials Network
CCTP	U.S. Climate Change Technology Program (unable to verify 3/14) \| Community-based Care Transitions Program
CCU	Capital Case Unit (changed to CCS)

CD	Climatological Data \| Compliance Division, OGE \| Counterintelligence Division
CDAC	Commerce Data Advisory Council (unable to verify 11/18)
CDAP	Center for Disability and Aging Policy (changed to CIP)
CDAT	Climate Data Analysis Tools (merged into UV-CDAT)
CDBB	Child Development and Behavior Branch
CDBG	Community Development Block Grants
CDBPR	Center for Developmental Biology & Perinatal Research (absorbed into DER)
CDBS	Consolidated Database System
CDC	Centers for Disease Control and Prevention
CDCO	Corporate Data Center Operations (changed to EO)
CDC WONDER	CDC Wide-ranging Online Data for Epidemiologic Research
CDD	Conserved Domains Database
CDDB	Contraceptive Discovery and Development Branch (changed to CRB)
CDDIS	Crustal Dynamics Data Information System
CDER	Center for Drug Evaluation and Research (older link archive; archive2; archive3; archive4)
CDFI	Community Development Financial Institutions
CDHC	Coral Disease & Health Consortium
CDIAC	Carbon Dioxide Information Analysis Center (older link archive)
CDIP	Crash Data Improvement Program (older link archive)
CDL	Commercial Driver's License Program \| Cropland Data Layer
CDM	Continuous Diagnostics and Mitigation (older link archive; archive2)
CDNS	Climatological Data National Summary
CDO	Climate Data Online
CDOM	Center for Delivery, Organization, and Markets (unable to verify 10/19)
CDP	Center for Domestic Preparedness
CDR	Chemical Data Reporting \| Climate Data Record Program
CDRH	Center for Devices and Radiological Health (older link archive; archive2; archive3)
CDS	Capability Development Support \| Cataloging Distribution Service
CDSI	Conservation Delivery Streamlining Initiative (unable to verify)
CDUP	Commerce Data Usability Project (unable to verify 11/18)
CDX	EPA Central Data Exchange

CE	Consumer Expenditure Survey
CEA	Council of Economic Advisers (older link archive)
CEAC	Consular Electronic Application Center
CEAM	Center for Exposure Assessment Modeling (older link archive)
CEAP	Conservation Effects Assessment Project
CEBAF	Continuous Electron Beam Accelerator Facility (older link archive; archive2)
CEBB	Customs Electronic Bulletin Board (migrated to CBP)
CEC	Commission for Environmental Cooperation
CECA	Center of Excellence on Children in Adversity
CECC	Congressional-Executive Commission on China
CED	Community Economic Development Program
CEDI	Cumulative Estimated Daily Intakes (older link archive)
CEDR	Comprehensive Epidemiologic Data Resource (older link archive)
CEDS	Common Education Data Standards
CEE	Consumer Education and Engagement Division (older link archive)
CEHTP	California Environmental Health Tracking Program (changed to Tracking California)
CEI	Climate Extremes Index
CEIC	Clean Energy Investment Center (changed to EIC)
CELS	Computing, Environment, and Life Sciences
CEMM	Center for Environmental Measurement and Modeling
CEMP	Community Environmental Monitoring Program
CEN	Bureau of the Census
CENC	Commission on Enhancing National Cybersecurity
CENDI	Federal STI Managers Group (formerly Commerce, Energy, NASA, Defense Information Managers Group)
CENRS	NSTC Committee on Environment, Natural Resources, and Sustainability (defunct or inactive 1/17, WH transition)
CEO	Chief Evaluation Office (older link archive) \| Collect Earth Online
CEOS	Child Exploitation and Obscenity Section
CEP	Community Eligibility Provision
CEPI	Center for Evidence and Practice Improvement
CEPPO	Chemical Emergency Preparedness and Prevention Office (unable to verify 12/15)
CEPS	Center for Earth and Planetary Studies
CEQ	Council on Environmental Quality (defunct or inactive 1/17, WH transition)
CER	Comparative Effectiveness Research (older link archive; archive2)
CERC	Columbia Environmental Research Center (older link archive) \| Crisis & Emergency Risk Communication
CERCLIS	Comprehensive Environmental Response, Compensation, & Liability Information System (defunct; replaced by SEMS)
CERT	Community Emergency Response Teams (older link archive; archive2) \| Comprehensive Error Rate Testing
CES	Center for Economic Studies (older link archive) \| Current Employment Statistics
CESD	Climate and Environmental Sciences Division (older link archive)
CESER	Center for Environmental Solutions and Emergency Response \| Office of Cybersecurity, Energy Security, and Emergency Response

CFA	Commission of Fine Arts
CFACT	Center for Financing, Access, and Cost Trends
CFAR	Centers for AIDS Research
CFATS	Chemical Facility Anti-Terrorism Standards (older link archive; archive2)
CFBCI	Center for Faith-Based and Community Initiatives (changed to CFBNP)
CFBNP	Center for Faith-Based and Neighborhood Partnerships (changed to CFOI)
CFDA	Catalog of Federal Domestic Assistance (replaced by Assistance Listings)
C-FERST	Community-Focused Exposure and Risk Screening Tool (no longer updating as of 8/19; older link archive)
CFFR	Consolidated Federal Funds Report
CFIUS	Committee on Foreign Investments in the United States (older link archive)
CFL	Computers for Learning
CFLHD	Central Federal Lands Highway Division
CFLR	Collaborative Forest Landscape Restoration (also, CFLRP)
CFLRP	Collaborative Forest Landscape Restoration Program (also, CFLR)
CFM	Census Flows Mapper \| Division of Contracting & Facilities Management, FWS (changed to CGS)
CFN	Center for Functional Nanomaterials
CFO	Chief Financial Officers Council
CFOC	Chief Financial Officers Council
CFOI	Centers for Faith and Opportunity Initiatives
CFP	Climate Friendly Parks Program \| Office of Child and Family Programs
CFPB	Consumer Financial Protection Bureau
CFPCGP	Community Food Projects Competitive Grant Program
CFR	Code of Federal Regulations (older link archive)
CFRP	Cuban Family Reunification Parole Program
CFS	Commodity Flow Survey (older link archive; archive2; archive3)
CFSAC	Chronic Fatigue Syndrome Advisory Committee (defunct 9/18)
CFSAN	National Center for Food Safety and Applied Nutrition (older link archive; archive2)
CFSRs	Child and Family Services Reviews (older link archive)
CFSRU	Counterterrorism and Forensic Science Research Unit
CFTC	Commodity Futures Trading Commission
CG	Comptroller General of the United States (older link archive)
CGAHR	Center for Grain and Animal Health Research
CGB	Cancer Genetics Branch (changed to CGCGB) \| Clinical Genetics Branch \| Consumer & Governmental Affairs Bureau (older link archive)
CGCGB	Cancer Genetics and Comparative Genomics Branch (older link archive)
CGCI	Cancer Genome Characterization Initiative
CGFS	Bureau of the Comptroller and Global Financial Services (older link archive)
CGH	Center for Global Health
CGMHR	Center for Global Mental Health Research
CGP	Catalog of U.S. Government Publications
CGS	Center for Global Security (unable to verify 8/19) \| Division of Contracting and General Services
CGSR	Center for Global Security Research

CHAD	Consolidated Human Activity Database
CHAMP	Centralized Household Goods Traffic Management Program (older link archive; archive2)
CHAMPVA	Civilian Health and Medical Program of the Department of Veterans Affairs (older link archive)
CHCO Council	Chief Human Capital Officers Council
CHDIR	CDC Health Disparities & Inequalities Report
CHE	Division of Chemistry
CHEDS	Center for High Energy Density Science (unable to verify 8/17)
CHEMM	Chemical Hazards Emergency Medical Management
ChemSTEER	Chemical Screening Tool for Exposures and Environmental Releases
CHI	Community Health Improvement
CHID	Combined Health Information Database (discontinued as of 9/06)
CHIEF	Clearinghouse for Inventories & Emissions Factors
CHIIC	CDC Health Information Innovation Consortium (older link archive)
CHIP	Children's Health Insurance Program (older link archive)
CHIRI	Child Health Insurance Research Initiative
CHNS	NSTC Committee on Homeland & National Security (defunct or inactive 1/17, WH transition)
CHORC	Community Health Online Resource Center
CHP	Combined Heat and Power \| COPS Hiring Program (older link archive)
CHPAC	Children's Health Protection Advisory Committee (older link archive)
CHRNS	Center for High Resolution Neutron Scattering (older link archive)
CHSI	Community Health Status Indicators (discontinued; merged into County Health Rankings & Roadmaps)

CI	Computation Institute (defunct 2018; older link archive) \| Criminal Investigation (older link archive)
CIA	Central Intelligence Agency
CIADM	Centers for Innovation in Advanced Development and Manufacturing
CIAO	Critical Infrastructure Assurance Office (see NIAC)
CIAP	Coastal Impact Assistance Program
CIB	Clinical Investigations Branch
CIC	Census Information Centers \| Consumer Information Center (discontinued; replaced by Pueblo.GPO.gov)
CIC/AG	Counterintelligence Center Analysis Group (unable to verify 2/17)
CICA	U.S.-Mexico Border Information Center on Air Pollution
CICP	Countermeasures Injury Compensation Program
CIDA	Center for Integrated Data Analytics (changed to OWI)
C-IEDS	Counter-IED Section
CI-FLOW	Coatal and Inland Flooding Observation and Warning Project
CIFS	Center for Innovative Finance Support
CIG	Conservation Innovation Grants
CIGIE	Council of the Inspectors General on Integrity and Efficiency
CIGP	Citizenship and Integration Grant Program (changed to Citizenship and Assimilation Grant Program)
CIH	Crop Insurance Handbook
CIHS	Center for Integrated Health Solutions (older link archive)
CIMC	Cleanups in My Community
CINDRR	Center of Innovation on Disability and Rehabilitation Research
CINMS	Channel Islands National Marine Sancturary
CINT	Center for Integrated Nanotechnologies
CIO Council	Chief Information Officers Council
CIOC	Chief Information Officers Council
CIP	Cancer Imaging Program \| Cataloging in Publication (older link archive) \| Center for Integrated Programs (older link archive) \| Division for International Communications and Information Policy
CIPRIS	Coordinated Interagency Partnership Regulating International Students (see SEVIS)
CIR	Current Industrial Reports (older link archive)
CIRA	Climate Change Impacts and Risks Analysis
CIRG	Critical Incident Response Group
CIS	Cancer Information Service (older link archive)
CISA	Cybersecurity and Infrastructure Security Agency (older link archive)
CISE	Directorate for Computer & Information Science & Engineering
CIT	Center for Information Technology \| United States Court of International Trade (older link archive)
CITA	Committee for the Implementation of Textile Agreements (unable to verify 2/16)
CITES	Convention on International Trade in Endangered Species of Wild Fauna and Flora
Cities-LEAP	Cities Leading through Energy Analysis and Planning
CIV	Civil Division
CJIS	Criminal Justice Information Services

CLA	Center for Legislative Archives
CLARREO	Climate Absolute Radiance and Refractivity Observatory
CLAS	Culturally and Linguistically Appropriate Services
CLASS	Center for the Library's Analytical Scientific Samples \| Comprehensive Large Array-Data Stewardship System (older link archive; archive2; archive3)
CLCCHC	Center for Linguistic and Cultural Competency in Health Care (unable to verify 9/19)
CLD	Center for Leadership Development \| Contract Law Division
CLDP	Commercial Law Development Program
CLEAR	Clearinghouse for Labor Evaluation and Research
CLG	Certified Local Government
CLIA	Clinical Laboratory Improvement Amendments (older link archive; archive2)
CLILL	Clinical Investigator Inspection List (older link archive)
Climate R&D	Climate Research and Development Program (older link archive)
ClinGen	Clinical Genome Resource
CLP	Chemistry of Life Processes
CLSD	Comprehensive Literacy State Development
CLU	Climate and Land Use Change (changed to Land Resources)
CMAQ	Congestion Mitigation and Air Quality Improvement Program
CMB	Clinical/Medical Branch \| Comparative Medicine Branch
CMBC	Creative Media and Broadcast Center (older link archive)
CMCS	Center for Medicaid and CHIP Services
CMECS	Coastal and Marine Ecological Classification Standard (older link archive)
CMEDE	Center for Materials in Extreme Dynamic Environments
CMEL	Center for Management and Executive Leadership (changed to FAA University; unable to verify 11/14)
CMGDS	Coastal and Marine Geoscience Data System
CMGP	Coastal and Marine Geology Program (changed to Coastal/Marine Hazards and Resources Program)
CMHS	Center for Mental Health Services
CMIP	Coupled Model Intercomparison Project (older link archive)
CMMD	Condensed Matter and Materials Division (changed to MSD)
CMMI	Division of Civil, Mechanical and Manufacturing Innovation
CMO	Certificate Management Offices \| Congressional Members Organization (older link archive)
CMOP	Coalbed Methane Outreach Program
CMOR	Climate Model Output Rewriter (unable to verify 5/15)
CMRP	Clinical Monitoring Research Program (changed to CMRPD)
CMRPD	Clinical Monitoring Research Program Directorate
CMS	Carbon Monitoring System \| Centers for Medicare and Medicaid Services
CMSHS	Center for Maritime Safety and Health Studies
CMSI	Crop Moisture Stress Index
CMSP	Coastal and Marine Spatial Planning
CMTS	Committee on the Marine Transportation System
CMU	Crisis Management Unit
CMV	Center for Minority Veterans
CMVS	Center for Motor Vehicle Safety

CN	Choice Neighborhoods program (older link archive)
CNAFR	Council for Native American Farming and Ranching (older link archive)
CNB	Clinical Neuroscience Branch (defunct)
CNCS	Corporation for National and Community Service
CNCSOIG	Corporation for National and Community Service Office of Inspector General
CNE	Office of Counternarcotics Enforcement (unable to verify 9/13; see 2010 OIG report)
CNEOS	Center for Near Earth Object Studies
CNM	Center for Nanoscale Materials
CNMS	Center for Nanophase Materials Sciences
CNPP	Center for Nutrition Policy and Promotion (older link archive; archive2)
CNS	Corporation for National and Community Service \| Division of Computer and Network Systems
CNSS	Committee on National Security Systems
CNST	Center for Nanoscale Science and Technology
COA	Clinical Outcome Assessments

COAC	Commercial Customs Operations Advisory Committee (previously, Advisory Committee on Commercial Operations of the Customs and Border Protection)
COAST	Coastal Ocean Assessments, Status, and Trends (unable to verify 5/16)
COBRA	Consolidated Omnibus Budget Reconciliation Act
CoC	Continuum of Care Program
COCA	Clinician Outreach and Communication Activity \| Coastal and Ocean Climate Applications (older link archive)
CoCASA	Comprehensive Clinic Assessment Software Application
CoCHP	Coordinating Center for Health Promotion (defunct)
CODIS	Combined DNA Index System
COE	Center for Outcomes and Evidence (merged into CEPI) \| Grants Center of Excellence
COGH	Coordinating Office for Global Health (changed to CGH)
COL	Cooperative Oxford Laboratory (older link archive)
COLC	Copyright Office, Library of Congress
COMBAT	Commercial Building Analysis Tool for Energy-Efficient Retrofits (unable to verify 6/19)
CONPLAN	U.S. Government Interagency Domestic Terrorism Concept of Operations Plan (.pdf)
CONSER	Cooperative Online Serials
COOL	Country of Origin Labeling
COOP	Continuity of Operations (older link archive; archive2) \| Cooperative Observer Network
CO-OP	Consumer Operated and Oriented Plan (older link archive)
CO-OPS	Center for Operational Oceanographic Products and Services
CoP	Conference of the Parties
COPAG	Cosmic Origins Program Analysis Group
COPR	Council of Public Representatives (unable to verify 11/14)
COPS	Office of Community Oriented Policing Services
COPs/ROPs	Country Operational Plans (older link archive)
COR	Cosmic Origins Program
CORAL	COral Reef Airborne Laboratory
CORD	CDC Online Resource Directory (unable to verify 12/18) \| Childhood Obesity Research Demonstration
CORE Network	Coordinated Outbreak Response and Evaluation Network (older link archive)
Core SVIPP	Core State Violence and Injury Prevention Program
Core VIPP	Core Violence and Injury Prevention Program (changed to Core SVIPP)
CoRIS	Coral Reef Information System
CORP	Corporation for National and Community Service
CORS	Continuously Operating Reference Stations
CoS	NSTC Committee on Science (defunct or inactive 1/17, WH transition)
COS	Report of Organization
COSIM	Climate, Ocean and Sea Ice Modeling (unable to verify 12/16)
CoSTEM	NSTC Committee on Science, Technology, Engineering, and Math Education (defunct or inactive 1/17, WH transition)
CoT	NSTC Committee on Technology (defunct or inactive 1/17, WH transition)
COTPER	Coordinating Office for Terrorism Preparedness & Emergency Response (defunct)
COTS	Cotton, Oilseeds, Tobacco and Seeds Division (unable to verify 12/13)

CP	Chemistry and Pharmacology Branch
CP3	Center for Primary Care, Prevention, and Clinical Partnerships (merged into CEPI)
CPA	Office of Congressional and Public Affairs, State
CPAD	Chemical and Pollutant Assessment Division
CPARD	Certification Plan and Reporting Database (older link archive)
CPARS	Contractor Performance Assessment Reporting System
CPB	Chemistry and Pharmaceutics Branch \| Corporation for Public Broadcasting
CPC	Climate Prediction Center \| Cooperative Patent Classification
CPCat	Chemical and Product Categories
CPD	Center for Protected Disclosures \| Correctional Programs Division \| Office of Community Planning and Development (older link archive)
CPDB	Carcinogenic Potency Database (retired 12/19)
CPEX	Census Program for Evaluations and Experiments (older link archive)
CPGL	Conservation of Private Grazing Land
CPGM	Compliance Program Guidance Manual (older link archive)
CPH	Census of Population and Housing
CPHC	Central Pacific Hurricane Center (older link archive)
CPHEA	Center for Public Health and Environmental Assessment
CPHST	Center for Plant Health Science and Technology
CPI	Center for Program Integrity (older link archive; archive2) \| Consumer Price Index \| Counter-Proliferation Investigations \| Office of Counter-Proliferation Initiatives (older link archive; archive2)
CPNI	Customer Proprietary Network Information
CPO	Climate Program Office \| Coral Protocols Online \| Corrections Program Office (now part of BJA)
CPONDER	CDC’s PRAMS Online Data for Epidemiologic Research (discontinued: replaced by PRAMStat)
CPP	Capital Purchase Program \| Clean Power Plan (older link archive)
CPPBSD	Committee for Purchase From People Who Are Blind or Severely Disabled (aka "U.S. AbilityOne Commission")
CPPD	Climate Protection Partnerships Division (unable to verify 9/15)
CPPM	Crop Protection and Pest Management Program
CPPW	Communities Putting Prevention to Work Program
CPR	Center for Population Research (absorbed into DER) \| Center for Preparedness and Response
CPRC	Conflict Prevention and Resolution Center
CPRS	Construction Progress Reporting Survey
CPS	Child Passenger Safety (replaced by Parents Central, then Parents and Caregivers) \| Current Population Survey
CPSC	Consumer Product Safety Commission
CPS-FSS	Current Population Survey Food Security Supplement
CPSO	Cataloging Policy and Support Office (changed to PSD)
CPSRB	Chemistry and Physiological Systems Research Branch (changed to CP)
CPVA	Child Pornography Victim Assistance (older link archive)
CQuIPS	Center for Quality Improvement and Patient Safety

CRA	Community Reinvestment Act
CRAD	Compliance Risk Analysis Division (older link archive; archive2)
CRB	Contraception Research Branch \| Copyright Royalty Board (older link archive)
CRC	Cancer, Reproductive, Cardiovascular, and Other Chronic Disease Prevention Program \| Civil Rights Center (older link archive)
CRCC Strategy	Cultural Resources Climate Change Strategy
CRCCP	Colorectal Cancer Control Program
CRCHD	Center to Reduce Cancer Health Disparities
CRCL	Office for Civil Rights and Civil Liberties
CRCP	Coral Reef Conservation Program
CRDC	Civil Rights Data Collection
CRDP	Cataloging Record Distribution Program
CRE	Climate Ready Estuaries
CreDS	Credentialing Distribution System
CRENL	Commission to Review the Effectiveness of the National Energy Laboratories
CREP	Conservation Reserve Enhancement Program
CREST	CIA Records Search Tool
CREW	Continuous Reliability Enhancement for Wind (older link archive; archive2)
CRF	Combustion Research Facility
CRGB	Clinical Research Grants Branch
CRGR	Committee to Review Generic Requirements
CRH	Contraception & Reproductive Health Branch (changed to CDDB, then CRB)
CRHP	Civil Rights History Project
CRIS	Center for Risk & Integrated Sciences (unable to verify 12/13) \| Current Research Information System
CRISP	Computer Retrieval of Information on Scientific Projects (merged into RePORT)
CRM	Criminal Division \| Cultural Resources Management
CRMC	Center for Research for Mothers & Children (absorbed into DER)
CROMERR	Cross-Media Electronic Reporting Rule
CROSS	Customs Rulings Online Search System
CRP	Community Resilience Panel for Buildings and Infrastructure Systems (older link archive) \| Conservation Reserve Program
CRPDG	Compensation Research and Program Development Group
CRS	Community Relations Service \| Congressional Research Service
CRSCI	Climate-Ready States and Cities Initiative
CRSRA	Commercial Remote Sensing Regulatory Affairs
CRT	Climate Resilience Toolkit
CRWU	Creating Resilient Water Utilities

CS	U.S. Commercial Service (older link archive)
CS&C	Office of Cybersecurity and Communications (changed to CISA Cybersecurity Division)
CSAC	Chemical Security Analysis Center \| Citizens' Stamp Advisory Committee
CSAP	Center for Substance Abuse Prevention
CSAPR	Cross-State Air Pollution Rule
CSAT	Center for Substance Abuse Treatment
CSB	U.S. Chemical Safety Board
CSBG	Cell and Structural Biology Group (older link archive; archive2) \| Community Services Block Grant
CSC	Climate Science Centers (changed to CASC) \| NOAA Coastal Services Center (merged into OCM)
CSCE	Commission on Security and Cooperation in Europe (Helsinki Commission)
CSCOR	Center for Sponsored Coastal Ocean Research (unable to verify 10/17)
CSD	Chemical Sciences Division (LLNL) (changed to NACS) \| Chemical Sciences Division (NOAA) \| Cyber Security Division (unable to verify 6/19)
CSDL	Coast Survey Development Laboratory
CSE	Office of Child Support Enforcement (changed to OCSE)
CSELS	Center for Surveillance, Epidemiology and Laboratory Services (older link archive)
CSEM	Case Studies in Environmental Medicine
CSEPP	Chemical Stockpile Emergency Preparedness Program
CSFP	Commodity Supplemental Food Program (older link archive)
CSGB	Computational and Statistical Genomics Branch (older link archive)
CSGCL	Crop Systems and Global Change Lab (changed to ACSL)
CSI	Center for the Study of Intelligence \| Climate and Societal Interactions Division (older link archive) \| Computational Science Initiative \| Conservation Study Institute (changed to Stewardship Institute) \| Container Security Initiative
CSN	Consumer Sentinel Network
CSO	Bureau of Conflict and Stabilization Operations (older link archive) \| Congressional Staff Organization (older link archive)
CSOS	Controlled Substance Ordering System
CSOSA	Court Services and Offender Supervision Agency for the District of Columbia
CSP	Charter Schools Program \| Community Science Program (older link archive) \| Conservation Stewardship Program
CSPR	Consolidated State Performance Reports (unable to verify 10/10)
CSR	Center for Scientific Review \| Comprehensive School Reform Program
CSRC	Computer Security Resource Center
CSREES	Cooperative State Research, Education, and Extension Service (changed to NIFA)
CSRS	Call Sign Reservation and Authorization System (older link archive)
CSS	Controlled Substance Staff \| Crime and Safety Surveys
CSSI	Center for Strategic Scientific Initiatives
CSSR	Climate Science Special Report
CSTL	Chemical Science & Technology Laboratory (merged into MML)
CSTLTS	Center for State, Tribal, Local, and Territorial Support

CT	Bureau of Counterterrorism and Countering Violent Extremism (changed to Bureau of Counterterrorism; older link archive)
CTA	Center for Transportation Analysis (unable to verify 9/19, see Transportation Analysis; older link archive)
CTAS	Center-TRACON Automation System
CTC	Counterterrorist Center (changed to NCTC)
CTD	Comparative Toxicogenomics Database (retired 12/19) \| Counterterrorism Division (unable to verify 11/14)
CTD2	Cancer Target Discovery and Development
CTE	Career/Technical Education
CTECS	Counter-Terrorism and Emergency Coordination Staff (older link archive; archive2)
CTEP	Cancer Therapy Evaluation Program
CTG	Community Transformation Grant Program
CTIIC	Cyber Threat Intelligence Integration Center
CTIP	Combating Trafficking in Persons
CTMB	Clinical Trials Monitoring Branch
CTN	Clinical Trials Network
CTP	Center for Tobacco Products (older link archive)
C-TPAT	Customs-Trade Partnership Against Terrorism (older link archive)
CTPP	Census Transportation Planning Products
CTR	Office of Cooperative Threat Reduction (older link archive; archive2)
CTS	Compliance Tracking System \| Countermeasure Tracking Systems (unable to verify 1/20)
CTTSO	Combating Terrorism Technical Support Office
CUC	Council on Underserved Communities (unable to verify 1/17)

CUE	Center for Urban Ecology (changed to NRS)
CUI	Controlled Unclassified Information
CUIO	Controlled Unclassified Information Office
CUPCAO	Central Utah Project Completion Act Office
CUPSS	Check Up Program for Small Systems (unable to verify 12/15)
CURE	Office of Credit Union Resources and Expansion (older link archive)
CVCTP	Commercial Vehicle Counterterrorism Training Program
CVDB	Chronic Viral Diseases Branch
CVE	Center for Veterans Enterprise (merged into OSDBU) \| Countering Violent Extremism (older link archive; archive2)
CVM	Center for Veterinary Medicine (older link archive)
CVP	Climate Variability & Predictability (older link archive)
CWBYCTP	C.W. Bill Young Cell Transplantation Program
CWC	Chemical Weapons Convention \| Compensation and Working Conditions (merged into MLR 9/12)
CWCS	Center for Workers’ Compensation Studies
CWG	White House Council on Women and Girls (defunct or inactive 1/17, WH transition)
CWHSP	Coal Workers' Health Surveillance Program
CWMD	Countering Weapons of Mass Destruction Office
CWNS	Clean Watersheds Needs Survey
CWSRF	Clean Water State Revolving Fund
CWSS	Civil War Soldiers and Sailors System
CWT	Compensated Work Therapy
CWTG	Coastal Water Temperature Guide
CXRO	Center for X-Ray Optics
CYFAR	Children, Youth, and Families at Risk Grant Program
CYGNSS	Cyclone Global Navigation Satellite System
CZIC	Coastal Zone Information Center (older link archive)